THE USE OF ORGANIC MANURES IN POLYCLTURE SYSTEM FORTILAPIA, MULLET AND CARP

National Institute of Oceanography and FisheriesKayet Bay, Alexandria. Egypt

Abstract

The impact of organic manure (poultry or cow manure) with or without supplementary feeding on water quality, growth performance and production as well as survival rate of Oreochromis niloticus, Mugil cephahts and Cypr'mus carpio reared in polyculture systems for 315days growing period was investigated . The results demonstrated that:1. Although, there were no nutrient limitations in experimental ponds, the nitrate and phosphate contents had higher levels in poultry manure treatment than cow manure '.Therefore, these ponds were rich inphyto and zooplankton.2. Poultry manure ponds with supplementary feeding possessed the highest growth performance and production parameters as well as survival rate compared with those using supplementary feeding with or without cow manure.